Casing point or strainer.



Patented May I3, |902.

A. E. CARLSON.

CASING vPOINT 0R STRAINER.

(Application led Apr. 9, 1901.)

(No Model.)

'mz noms mens cof. moro-mu. wnulunrvl, n. c.

UNITED STATES PATENT OFFICE.

ANDREW EDWARD CARLSONOF ELCAMPO, TEXAS.

CASING POINT" OR STRAINER.

SPECIFCATION forming part of Letters Patent No. 700,015, dated May 13,1902. Appupaipn ined April 0, 1901. serai No. 55.040. (No man To @ZZwhom, t may concern:

Beit known that I, ANDREW EDWARD CARL- SON, a citizen of the UnitedStates, residing at Elcampo, Wharton county, Texas, have inventedcertain new and useful Improvements in CasingPoints or Strainers; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to certain improvements in well-casing points orstrainers, particularly adapted for use inoil and Artesian wells.

An object of my invention is to provide an exceedingly simple, durable,and economical casing point or strainer which will permit freecirculation of the liquid around the lower portion otY the casing andfree and easy entrance of the same into the casing, and yet' willprevent entrance of sand and gravel into the casing.

A further object of my invention is to provide certain improvements incasing points or strainers whereby such an article will be produced ofhigh eftioiency and possessing many features of advantage. Y y Myinvention'oonsists in certain novel fea. turesin construction, incombination of parte and in arrangements of details, as more fully andparticularly pointed out and specified hereinafter.

Referring to the accompanying drawings, which show, for the purposes ofillustration and explanation, a construction as an example from amongother arrangementswithin the spirit and scope of my invention, `Figure lis a side elevationfof the point or strainer,

the wire netting or gauze covering being shown partially broken away toshow the wire wrapping which can be employed and a portion of the wirebeing broken away to show the truss or stay rods and casing. Fig. 2 is aside elevation of the device without the wire wrapping and gauze.section,enlarged,through the point or strainer and the'uptake or suctionpipe or casing. Fig. 4 is a detail perspective View of the lower end ofthe point or strainer, the truss-rods being removed and the bottomstrainer-plate,

shown separated from the depending legs. Fig. 5 is a detail elevation ofthe lower end nut c screwin0` u against said late.

Fig. 3 is a cross-- of the strainer and casing, the strainer-coveringbeing removed, the casing and end plate and ring being partially brokenaway. Fig. 6 is a detail section through part of the casing, showing ameans for attaching the upper ends ofthe truss or stay rods thereto.Fig. 7 is a detail plan view of the bottom ring.

In the drawings, ais the well pipe or casing, openat itslower end ot. v

b is a perforated or reticnlated plate, in the example shownconstituting the lower end or extremity or the casing point or strainerand located opposite and a distance below the open end d of the casinga. The plate b is spaced from and supported by the depending rigidlegsc, at their upper ends rigidly secured to, as by rivets, the lowerVportion of the casing and at their lower ends suitably secured to saidbottom plate. In theexample 'illustrated I show three legs cequallyspaced around the lower end of the casing and depending therefromvirt-ually in continuation thereof, each leg being preferably formed bya metal, rod having its lower end reduced and threaded and passedthrough said bottom plate and provided on its lower end with a The upperend of each leg c can be flattened where it laps over the pipe or casingand perforated to receive'the fastening means. y,

An open-work or strainer coveringA (sometimes eight or teu feet long)Vis providedextending from said bottomv plate longitudinally of the pipeor casing to aY point considerablyabove the lower openend 0,' thereofand forming a `water-.circulating Vchamberaround the pipe and at itslower end openingpinto the water-collecting space or chambervbpetweenthe bottom plate and open endo. of the pipe and Within the saidstrainer-.cpovering.l Said strainer covering or casing can 'be' composedof variousmaterials and can be constructed or formed rin various waysWithin the spirit and scopeofmy invention. j

In the example illustrated IprovideI a supporting-framework for saidstrainer-covering comprising a series of parallel rods d,arrangedlongitudinally of therpipe At their upper ends saidrods d are secured tothe pipefas by hooked ends, (see Fig. 6,) vand ina series extendingaround the pipe, so that the upper ends of allvthe rods are preferablysecured in IOO the same plane transversely of the pipe and at thedesired distance above the lower open end of the pipe. The rods extendalong the exterior' of the pipe and are preferably threaded at theirlower ends, and said threaded ends of the rods (l are passedtransversely through a ringe, (see Fig. 7,) located above the bottomplate b. Each rod d is secured to said ring by one or more nuts tZ, thenuts d on the lower ends of said rods being located between the saidring and the bottom plate l). The legs o pass loosely through the ring,and the shoulders at the upper ends ofthe reduced portions of the legsabut against the top face of said ring.

The rods (Z are preferably equally spaced and form a series around thepipe, and means are provided to support the rods a suitable distancefrom the exterior of the pipe to form the water-circulating space aroundthe exterior of the pipe.

f represents studs or projections at their inner ends secured in thepipe and projecting radially therefrom and each at its outer end j"forked or formed with a seat to receive a rod d and hold the same thedesired distance from the outer surface of the pipe. These studs arearranged in series around the pipe, the studs ot each series beingprefer'- ably ot the same length, and several series of the studs areprovided, the series being located the desired distance apart to formthe necessary supports for the rods. The rst series of studs, at theupper end ofthe strainer, are located a distance below the transverseplane, including the points of attachment of the upper ends of the rodsd to the pipe, so that the rods are inclined downwardly and outwardlyfrom said points of attachment to said studs of the uppermost series,whereby the upper end of said framework, and consequently the strainercasing or covering, tapers upwardly to the circumference of the pipe.The lower series of studs is usually located around the lower end of thepipe, so that the rods are inclined inwardly and downwardly from saidbottom series of studs to the ringe at the lower end of the strainer orpoint, whereby the framework formed by said sesies of rods tapers inopposite directions at its ends. The framework formed by said series ofrods is usually cylindrical between said top and bottom series of studs.

The series of rods can be exteriorly wrapped with wire g from end toend, if desired, to form the strainer casing or covering, which permitsfree ingress of water or other liquid, and yet prevents entrance of sandor gravel. \Vhen the strainer-casing is thus formed by wire, the wireshould be closely wrapped. It desired, the wire can be somewhat looselyor more openly wrapped and then covered by wire netting or gauze orwire-cloth or thin reticulated metalg. If desired, the wire wrappingneed not be employed, and suitable perforated metal or wire-cloth can bewrapped around the framework formed by rods (Z to constitute a suitablestrainer casing or covering.

h 7L are protecting and bracing rings exteriorly surrounding the strainer casing or covering and wedging on the tapered ends thereof to aboutthe planes of the top and bottom series of studs for the purpose ofbracing and strengthening the parts and to protect said covering fromcontact with the sides of the well as the point is being inserted orremoved. These rings 7L are of sufficient thickness to project beyondthe circle of the strainer-covering, and thus act as guards.

By reason of the tapered upper end of the strainer-casing the device canbe easily removed from the well without sticking or wedging therein andwithout damage to the strainer.

The water is free to circulate around and longitudinally of aconsiderable length of the pipe above its lower open end and is free toenter the water collection-chamber below the open end of the pipe. Thewater is free to enter through the bottom plate ofthe strainer, whichplate is usually covered with wire cloth or gauze if the openings orperforations therethrough are otherwise large enough to permit passageof sand and gravel. Gravel and sand and other foreign material isprevented from entering the pipe, yet the water is allowed freecirculation around and entrance thereto both at the bottom end andthrough the side walls of the strainer.

Practical use has demonstrated the utility and many advantages of thestrainer or casing point described herein.

It is evident that various changes and modifications might be resortedto in the forms, constructions, and arrangements of the parts describedwithout departing from the spirit and scope of my invention. Hence I donot wish to limit my invention to the exact constructions shown.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is-

1. Awell-strainercomprisingapipehaving a bottom inlet, a rigid framedepending below the pipe, trussed rods arranged longitudinally ofthepipe and in a series around the same and at their upper ends secured tothe pipe and at their lower ends secured to said frame, said rodsbetween their ends arranged a distance from the outer surface of thepipe, and a strainer-covering arranged around the series of rods,substantially as described.

2. A well-strainercomprisinga pipe having a bottom inlet and radialsupports projecting beyond the outer wall of the pipe, rods arrangedlongitudinally ot the pipe and in a series around the same and drawninwardly and secured at their end portions, said rods between their endinclined portions being held away from the outer surface of the pipe bysaid supports, a strainer-casing around said series of rods and taperingoppositely at the end portions, substantially as described.

IOO

IIO

ISO

3. In combination, a pipehaving an open lower end, the vlegs secured toand projecting below the pipe end, the strainer-plate secu red to thelower ends of said legs, the ring on the legs above thestrainer-platarods arranged longitudinally of the pipe and in a seriesaround the same, said rods at their upper ends secured to the pipe andat their lower ends secured to said ring,-the radial studs projectingfrom the pipe and engaging said rods between their ends and holding thesame a distance from the surface ofnthe pipe and forming the series ofrods tapering inwardly and upwardly at the upper end, astrainer-covering around the series of rods, and exterior guard-ringsaround said covering, substantially as described.

4. VA casing point or strainer comprising a well tube or casing, aframework secured thereto and arranged longitudinally thereof andextending below said tube and having a longitudinally-tapered end,'astrainer-covering around said framework and conforming to the taperedendthereof, and-a guard-ring slipped over and wedged on the exterior ofsaid covering and located at the large end of said tapered portion,substantially as described.

5. A casing point or strainer comprising a well tube or casing, rodsrigid therewith and projecting longitudinally beyond the end thereof, anend plate carried by said rods a distance beyond the end of' the casing,a framework extending longitudinally of the casing and at the upper endsecured thereto and at the lower end secured to said rods, and astrainercovering around and thelength of said framework, substantially asdescribed.

6. A casing point or strainer comprising a well-tube having an endinlet, a frame rigid with and projecting below said end of the tube andhaving a perforated bottom fioor a distance below said tube end, aframework extending longitudinally of said tube'and at itsupper portiontapered inwardly and upwardly and secured to said tube and below itsupper end held away from said tube and extending below the tubeand atitslower portion secured to the lower portion of said frame, and astrainer coveringl around and the length of said frameworkand forming awater-space around and below the tube,.sub stantially. as described.`

7. Incombination,thepipeorcasinghaving a lower inlet end, and a strainermovable into and out of the well with said pipe and com-` prising aframework surrounding said'pipe and arranged longitudinally thereof-from a pointabove said. inlet end to apoint below the same, Ysaidframework between its ends held away from the exterior of the pipe toform a .water-circulating space around the same, and having its upperend tapered npwardlyand inwardly to the pipe and secured thereto, meansrigid with and projectingbelow the pipe, the lower endof said frameworktapered inwardly.. and downwardly andse-` cured to said means 'belowsaid inlet end ofthe pipe, a strainer covering around said framework,and exterior guards around said strainer-covering and projecting beyondthe same to prevent injury thereto as the pipe is inserted in or removedfrom the well, substantially as described. v n

8. In combination, a pipe having an inlet, rods arranged longitudinallythereof Yand in. a series around the same and at their upper endssecured tothe pipe a distance abovesaid inlet, and at their lower endsprojecting below the inlet, means rigid with said pipe and to which thelower endsv of said rods are secured, the lower ends'of said rods beingthreaded and provided with nuts screwing thereon for tightening the rodsand securing the same at their lower ends, and a strainer coveringaround said series vof rods and forming a water-circulating chamberaround-said pipe, substantially as described.

9. In combination, a pipe having an inlet, an open framework arrangedlongitudinally of said pipe from a point above said inlet to a pointbelow the same, said frame-at its up. per end secured to the pipe and atits lower end provided with means securing it to the` pipe, spacingdevices arranged between 'the pipe and intermediate portionsof theframework and holding said framework, between its ends, awayfrom thepipe, whereby the ends of the framework are tapered inwardly, inopposite directions, and a strainer-covering around said framework andforming an open water -space within the framework around the pipe,substantially as described.

10. In combination, a pipe-having a lower inlet end, legs rigid with anddepending below said end,.a reticulated bottom plate secured to saidlegs, an open framework arranged longit-udinallyof saidpipe and. se

cured thereto and between'its ends trussed therefrom and extendingdownto said plate and confined to said legs, and a strainer-coveringaround and throughout the length'ofY saidframework, substantially asdescribed.

I11. In combination, a pipehaving alower inlet, an openframeworkinclosing, securedv to and arranged longitudinally of` saidr pipe from apoint above to a point below. saidinlet, said framework at one endfixedly secured IOO IIO

andat the opposite endprovided-Withlongitudinally-screw-threadedfportions and nuts thereonsecuring the frame. and drawing the same longitudinally taut, anabutment for said nuts, and a strainer-covering around.

said framework and yforming a water-space within the same, substantiallyas described.

12. In combination, thepipe havinga bot# tom inlet, an open frameworkarranged aroundy i the pipe andfextending longitudinally thereof,theupper end of said framework drawn v inwardly on an upward taperto-theexteriorl surface ofthe pipe and there secured to said I pipe, meanssecuring the,l lower end' ofV the framework. rigid-with thepipeythelower end of the frameworkdrawnfinwardlyon a down f h ward taper, and astrainer-covering s eeured around said framework, substantially asdescribed.

13. In combination, a pipe having a bottom inlet, a series of rodsarranged around and extending longitudinally of said pipe and at theirupper ends secured to the pipe, a plate through which the lower ends ofsaid rods pass, means confining said plate to the pipe, the lower endsof said rods longitudinally threaded and provided with tightening andsecuring nuts, and a strainer-covering around said rods, substantiallyas described.

14. In a well-strainer, in combination, an uptake pipe or casing havinga lower inlet end, and an open framework secured to and carried by saidcasing and arranged longitudinally of said easing and projecting adistance below the inlet end thereof, said framework comprising a seriesof rods arranged longitudinally of and in a series around the casing,means confining said rods at their ends, and intermediate spacing orsupporting devices arranged within the series of rods and engaging thesame, said series of rods having a diameter greater than the exteriordiameter of the easing, and a strainer-covering around the exterior ofthe series of rods, substantially as described.

15. In combination, in a well-strainer, an uptake pipe or casing havinga lower inlet end, and an open framework secured to said easing aboveits inlet end and eXtendinglongitudinally thereof to a point below thesame and comprising a bottom head or plate, a multiplicity of rodsconfined at their ends and arranged longitudinally of said pipe and in aseries around the same and at their lower ends confined to said bottomhead, and intermediate spacin g or secu ring devices arranged atintervals within the series of rods and formed to fit the individualrods, and a strainer-covering wrapped around the exterior of the seriesof rods, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

ANDRE iV EDWARD CARLSON.

Witnesses JNO. E. NoRnLIUs, E. PERssoN.

